I have a small RamNode VPS that I use as a VPN server. I also host my personal wiki on there and use it to document interesting things that I would otherwise forget. The information in my wiki is pretty valuable to me. I therefore decided that I needed a way to automatically backup my wiki, just in case.
I'm a pretty big fan of Amazon S3 and what better place is there to backup your data? It's safe, secure and very cheap!
Sadly though, I couldn't find a working S3 backup script for DokuWiki that was written in PHP. The official DokuWiki websites lists Ruby and Python scripts but since I'm not familiar with those languages (and don't have them on my server) I decided to write one in PHP.